Expand file matching to incorporate Debian 9+ file naming

convention for split named.conf and use of include
statements

Oups, broke "foo.".

Fixup a eol bug.

It seems that a zero-width positive lookahead does not work as the
opposite zero-width negative lookahead. Also, > seems to work better
than my own crafted version.

1.0.

a zoneDomain can also be a sole @.